Great fun if you are able to walk up and down steep paths and sand dunes. We saw loads of sea lions on the beach, in the water, etc. some tourists were no respecting their space unfortunately! To have even more fun we should have brought a sled or boogie board to sled down the sand dunes!
San Jac is one of 2-3 high peaks in SoCal. Worth the hike. The EZ way is via the PS Tramway. Real hikers will take the Art Museum Trail or Devil’s Slide Trail from Idyllwild.